Industria Nazionale Giocattoli Automatici Padova, founded in the 1920s in Padova, Padua, Italy. Ingap mainly produced mechanical trains, cars and airplanes.
As happened in other countries, INGAP started to move over to plastic in the 1950s and produced cars in scales ranging from 1/24 to 1/75. The smaller cars, made between 1958 and 1965, were sold in boxed sets as they were too small and cheaply made to be worth marketing indivdually. The trucks are crude and non-protortypical but the cars are rather more interesting.
What's it worth? Take a look at this Ingap price guide: sold listings for a value indication.